Clamp.



F. HACHVIANN.

CLAMP.

APPLICATION FILED MAR. i3. 1915.

Patema July 10i, 1917.

cfr #AQ/MANN,

FREDERICK HACHMANN, OF ST. LOUIS, MI C. SCHOENTH'ALER AND ONE-FOURTH T0 jj ,2,3;3223 specification of Letters Patent.

To all whom it may concern: j

Be it known that I, FREDERICK HACH- a citizen of the United States, and

in the State of Mise invented a certain new and useful Improvement in Clam following is a specification.

This invention relates to clamps, and more to clamps for small work.

bjects of this invention is to provide a sheet metal clamp which combines lightness with rigidity.

Another object is to pro which is simple in construction, consists a few parts, and is cheap to manufacture.'

Further objects will appear from the detail description tak residing at St. Louis, souri, hav

ps, of which the particularly,

One of the o vide a clamp en in connection with the accompanying drawing, in which:

Figure 1 is a perspective view of one form of clamp embodying this invention; Fig. 2 is a side elevation; Fig. 3 '1s a section on the line 3-3, Fig.

` A yis claimed is: s a section on the linel--LL Fig. 2. g to the accompanying drawing, it will be noted that the clamp body comprises a pair of arms 12. This body sheet metal, and is to provide a body jecting side anges web, which normall metal forming the web, is bent ove and this `piece and the web are d threaded 'to form a rein- This socket is and 11 connected is constructed of of channel section so as web and radially pro- 13. A part 14 of the y is an extension o f the perforated an forced threaded socket.

adapted to receive a screw 15 having a knurled' head 16 and a reduced part 17 rea swivel plate or disk 18, which is ted on the screw by -peening the end of the reduced p`or head 19. The swivel plate rotatively moun or riveting over tion 17 to form a SSOURI, ASSIGNOR-OF ONE-FOURTH TO FRED JAMES B. HOLLIS, OF ST. LOUIS, MISSOURI.

CLAMP.

Patented July 10, 1917..

Application led March 13, 1915. Serial No. 14,275.

is of conical form so thatthe peened over part 19 will be countersunk.

The clamp body is thus formed of a single piece of sheet metal formed by suitable dies so as to have the maximum strength with the minimum of material used. The reinforced socket is formed in a simplel manner, and forms an ample thread for receiving the screw. The swivel plate 18 is also formed of stamped sheet metal, and this swivel plate is placed in position on the screw after tlhis screw is placed in the socket. The screw and the arm 10 thus form the coperating jaws of the clamp. The clamp body may be either enameled, or the whole maybe plated.

It is obvious that various changes may be made in the details of construction without departing'from the spirit of this invention. It is, therefore, invention is not to be limited to the specific construction shown and described.

Having thus described the invention what A clamp'comprising a U-shaped pressedmetal body formed in one piece and presenting a pair of relatively spaced arms xedlyconnected by a yoke, said body, in cross-section, consisting 0f a continuous body web and areinforcing ange projecting radially from each side of said web, the end of said web being turned .over against itself and said web and said turned over partl being threaded to form a socket, and-.an adjustable, 4work-clamping screw mounted in said socket for coperationwith the other arm to clamp the work.

In testimony whereof I affix my signature inthe presence of these two witnesses. f FREDERICK H'AGIIMANN. Witnesses:

JOHN A. DowDALL, j ARTHUR B. Gamma.

to be understood that this 

